Scaffold-bracket.



UNITED STATES PATENT FFICE.

FREDERICK EWING, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF TO IRA R.AMSDEN, OF BUFFALO, NEW YORK.

SCAFFOLD-BRACKET.

SPECIFICATION forming part of Letters Patent Nth 689,390, dated December24, 1901.

Application filed May 1, 1901.

T0 at whom it mag concern:

Be it known that'I, FREDERICK EWING, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented a new and useful Improvement in Scaffold-Brackets, of which thefollowing is a specification.

This invention relates to sca ffold-brackets which are designed to beadj ustably attached to ordinary ladders for supporting the scaffold-planks at difierent elevations.

The object of my invention is the construction of a strong, stable, andinexpensive bracket of this kind which can be readily adjusted to fitladders of different widths.

In the accompanying drawings, Figure 1 is a perspective View of ascaffold embodying myimproved brackets. Fig. 2 is an enlargedfragmentary vertical section taken lengthwise through one of thehorizontal supporting-arms of the bracket and the upper portion of thebrace. Fig. 3 is a similar view taken vertically through the brace andlengthwise through one of its legs. Fig. 4 is an enlarged top plan viewof the head at the upper end of the brace. Fig. 5 is an enlarged frontview of the plate or enlargement of the upper brace member.

Like letters of reference refer to like parts in the several figures.

A A are a pair of horizontal arms which support the scaifold-plank B andwhich are provided at their rear ends with hooks a, which embrace one ofthe rungs of the ladder. These supporting-arms are attached at theirfront ends to a horizontal plate or head 0, preferably by vertical pinsor pivots 0, so that the rear portions of the arms can be adjustedlaterally to bear against the inner sides of the ladder-rails and to fitladders of different widths. In the preferred construction shown in thedrawings the supporting-arms A are adjustably secured in position byVertical clamping-bolts d, which pass through the arms on the rear sidesof their pivots and through slots d, formed in the head 0 and curvedconcentrically with the pivots of the arms. The head 0 is provided atits outer end with an upwardly-projecting lug or stop 6 for retainingthe scaffold-plank upon the bracket.

The brace of the bracket preferably comprises an upper extensible memberF, pivoted at its upper end to the front portion of the head 0 by atransverse pin f, and a pair of downwardly-diverging legs F, adjustablyat.- tached at their upper ends to the member F. The latter is composedof a pair of bars f, made longitudinally adjustable on each other by anysuitable means, such as transverse clamping-bolts f each passing throughone set of a vertical series of openings formed in the two bars f, asshown in the drawings. The extensible member F is provided at its lowerend with a plate or enlargement G, to which the legs F are pivoted bypins 9, passing transversely through the plate, therebypermitting thelegs to be adjusted laterally to fit ladders of different widths. Theadjustable legs may be clamped in position by transverse bolts h, whichpass through slots it, formed in the plate G concentrically with thepivots of the legs. The latter are provided at their lower ends withforks i, which straddle the adjacent rung of the ladder. Upon looseningthe clamping-bolts d and h the scaffold-supporting arms A and the legs Fof the brace can be adjusted laterally to bear against the inner sidesof the ladderrails for firmly holding the bracket against lateraldisplacement on the ladder, and after adjusting the parts theclamping-bolts are again tightened.

The bracket can be readily attached to and detached from an ordinaryladder and can be folded for compact storage and transportation. Thebracket may be supported on the front side of the ladder, as shown byfull lines in the drawings, or it may be suspended from the rear side ofthe ladder, as shown by dotted lines in Fig. 1.

I claim as my invention- 1. In a scaffold-bracket for ladders, thecombination with a head, of a pair of scaffoldsupporting arms capable oflateral adjustment on said head and provided at their rear ends withattachments constructed to'engage with a ladder, and a brace attached atits upper end to said head and provided at its'lower *cdmbination with ascaflold-supporting arm provided at its rear end with an attachmentconstructed to engage with aladder,of a brace extending downwardly fromthe front portion of said arm and provided at its lower end with a plateor enlargement, laterally-adjustable legs pivoted at their upper ends tosaid plate by pivots passing transversely through the plate, andprovided at their lower ends with attachments constructed to engage witha ladder, and clamping devices for securing said legs intheir adjustedposition, substantially as set forth.

4. In a scaifold-bracket for ladders, the combination with a head, oflaterally-adjustablescaffold-supporting arms pivoted to said head,clamping d eviees for securing said arms in position on the head, a bracepivoted at its upper end to said head and composed of an upper memberprovided at its lower end with a plate or enlargement, andlaterally-adjustable legs pivoted at their upper ends to said plate bypivots passing transversely through the plate, and clamping devices forretaining said legs in their adjusted position, substantially as setforth.

Witness my hand this 29th day of April, 1901.

FREDERICK EWING.

Witnesses:

THEO. L. PoPP, CARL F. GEYER.

